Why do you think all organisms (prokaryotes and eukaryotes) can use glycolysis but not all organisms use the kreb's cycle and etc (only eukaryotes do)?

It is simply because glycolysis contains enzyme systems in the cyotplasm. On the other hand, krebs cycle contains enzymes in the mitochondria. There is no Krebs cycle if the organism does not have mitochondria. Take note that not all organisms have mitochondria.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.